EP0821074A1 - Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique - Google Patents

Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique Download PDF

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Publication number
EP0821074A1
EP0821074A1 EP96810492A EP96810492A EP0821074A1 EP 0821074 A1 EP0821074 A1 EP 0821074A1 EP 96810492 A EP96810492 A EP 96810492A EP 96810492 A EP96810492 A EP 96810492A EP 0821074 A1 EP0821074 A1 EP 0821074A1
Authority
EP
European Patent Office
Prior art keywords
strip
cast
tape
rolling
printing plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96810492A
Other languages
German (de)
English (en)
Inventor
Günther Höllrigl
Glenn Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to EP96810492A priority Critical patent/EP0821074A1/fr
Priority to AU28594/97A priority patent/AU713379B2/en
Priority to IS4521A priority patent/IS4521A/is
Priority to CA002210588A priority patent/CA2210588C/fr
Priority to ZA9706325A priority patent/ZA976325B/xx
Priority to US08/896,539 priority patent/US6439295B1/en
Priority to NO973398A priority patent/NO973398L/no
Priority to HU9701289A priority patent/HUP9701289A3/hu
Priority to JP20020697A priority patent/JP3315059B2/ja
Publication of EP0821074A1 publication Critical patent/EP0821074A1/fr
Priority to US10/175,914 priority patent/US6655282B2/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
    • B41N1/083—Printing plates or foils; Materials therefor metallic for lithographic printing made of aluminium or aluminium alloys or having such surface layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the invention relates to a method for producing a Band made of aluminum or an aluminum alloy for electrolytic roughened, lithographic printing plates, whereby the alloy is continuously cast into a ribbon and the cast strip is then rolled to its final thickness.
  • the invention is therefore based on the object of a method to create the type mentioned, in which the End-thick rolled strip for electrochemical attack has optimal microstructure.
  • the solution to the problem according to the invention is that Rolling to final thickness with a rolling degree of at least 90% and is carried out without further heat supply.
  • the thickness of the cast tape is preferably max. 5 mm, in particular max. 4 mm.
  • An ideal microstructure is achieved if the cast strip max. 3 mm, especially about 2.5 to 2.8 mm.
  • Every strip casting process can be used, ideally rapid solidification with simultaneous hot forming in the casting roll gap is desired.
  • the latter two The casting and rolling process, for example, has properties in which the alloy in the casting roll gap between chilled rolls is cast to the belt.
  • the continuous casting process enables at the same time high solidification speeds and very fine grain sizes in areas near the surface through dynamic recovery immediately after the cast tape emerges from the Casting nip.
  • the further processing of the cast strip is carried out by Reeling the cast tape into a desired bundle Size.
  • that is Band in a suitable for the production of litho sheets Cold rolling mill to the desired final thickness of 150 - 300 ⁇ m rolled.
  • the one that solidifies in the casting roll gap and is partially hot-formed Tape is preferred to prevent grain coarsening no further heat added. Is the thickness of the cast tape but much more than 3mm, e.g. 7mm, so it may be necessary that on the cast tape before rolling to final thickness immediately after exiting a hot rolling pass is carried out in the casting roll gap. For Achieve an optimal structure and at the same time Minimization of processing steps that cause costs however, should be as thin as possible be cast that dispenses with a hot rolling pass can be.
  • Cold rolling without intermediate annealing leads to a strong cold deformed substructure with high dislocation density and thus the preferred microstructure that has a uniform electrochemical attack guaranteed during etching.
  • a tape produced according to the invention has excellent mechanical properties Properties, e.g. high strength, which also during the baking of a photosensitive varnish only insignificant in the production of lithographic printing plates decreases.
  • the tape produced according to the invention is equally suitable for etching in HCL and HNO 3 electrolytes, the advantages of the microstructure obtained being particularly apparent when etching in an HNO 3 electrolyte.
  • alloy for the production of the tape according to the invention can basically all for the production of lithographic Printing plates commonly used aluminum materials be used. Are particularly preferred Alloys from the AA 1xxx, AA 3xxx or AA series 8xxx.
  • lithographic printing plates made from a tape according to the invention After electrolytic etching in an HNO 3 electrolyte, lithographic printing plates made from a tape according to the invention have an etching structure which is improved in comparison with conventionally produced printing plates and at the same time has lower energy consumption.
  • the advantage of a lithographic produced according to the invention Pressure plate compared to a conventionally manufactured one Plate also shows up in that after baking a photosensitive varnish, for example during 10 min at 250 ° C, the produced according to the invention Printing plate has a higher strength.
  • the above-mentioned advantageous microstructure in the area of the strip near the surface essentially results from the rapid solidification on the surface.
  • the secondary phase particles are separated out in the microstructure in a very fine form and in high density.
  • These particles act as the first points of attack for the etching, especially when the electrochemical roughening is carried out in an HNO 3 electrolyte.
  • the particles mentioned have an average distance of less than 5 ⁇ m and thereby form a coherent network of uniform surface attack points. Starting from these first points of attack, distributed uniformly and in high density over the entire strip surface, the growth of the actual three-dimensional roughness pattern begins.
  • the small size of the intermetallic phases mentioned has the further advantage that they considerably shorten the time span of the electrochemical dissolution in the initial phase of the etching, as a result of which electrical energy can be saved. Since the rapid solidification according to the invention preferably causes imbalance phases to occur in the surface areas of the strip, the dissolution rate of the fine particles mentioned is likewise higher than the dissolution rate of the coarse intermetallic phases with an equilibrium composition as are present in conventionally processed materials.
  • Another essential microstructural feature of the The tape produced according to the invention is the small grain size, which are near the surface during strip casting Areas results.
  • the high density of the puncture points the grain boundaries on the surface along with a high defect density in the grains themselves too chemical active targets for continuous education new dimples.
  • Thickness was initially between the casting rolls of a belt casting machine cast a tape with a thickness of 2.5 mm. The strip cast in this way was then subjected to no intermediate annealing Cold rolled to final thickness.
  • the phases were AlFeSi-containing, their size and distribution during solidification in the areas close to the surface due to very different Solidification speed is given.
  • the second essential structural parameter, the grain size was determined at the intermediate thickness of 2.5 mm. It should be noted here that the strip casting material is actually in a slightly deformed casting state, whereas the continuous casting material is in this thickness after soft annealing in the recrystallized state. In this way, two representative grain sizes are compared with each other, since the same rolling degrees to the final state are made from this thickness.
  • the measurement of the number of grains per unit area on the belt surface or in the near-surface cross section led to the following results: surface cross-section Band casting material: 20000 grains / mm 2 48000 grains / mm 2 Continuous casting material: 250 grains / mm 2 520 grains / mm 2
  • the fine grains of the tape casting material are mostly attributable to subgrain formation, their average size is about 5 ⁇ m, while the recrystallization grain after Coil annealing in conventional production is a medium one 70 ⁇ m in size.
  • the continuous casting strip and the strip cast according to the invention are further processed by cold rolling to the desired final thickness of the litho strip in the thickness range from 0.2 to 0.3 mm.
  • An essential property of the litho tape now results from the subsequent process step, the electrochemical roughening, which should produce the most uniform etching structure on the surface.
  • electrolytes from dilute hydrochloric acid (HCL) and on the other hand electrolytes from dilute nitric acid (HNO 3 ) are used.
  • the second structural improvement is the fine grain. Grain boundaries are always weak points in the natural oxide film of aluminum. The finer the grain, the more imperfections are in the overlying Produces oxide film and the higher the nucleation rate for the emergence of dimples.
  • Electrolyte 20 g / l ENT 3 1 g / l Al Room temperature
  • Substrate material AA 1050, identical composition in both cases
  • Counter electrode Sample material
  • litho sheet required a charge quantity of at least 480 coulomb / dm 2 measured at constant voltage, corresponding to an etching time of 60 sec with an initial current density of 20 A / dm 2 , in order to produce a uniform etching structure.
  • the litho sheet produced according to the invention only required a charge of 360 coulombs / dm 2 for the formation of a homogeneous etching structure.
  • the initial current density was 17A / dm 2 and the etching time was 55 seconds.
  • the etching structures produced in the same electrolyte and under conditions as in Example 1 showed the following behavior as a function of the amount of charge used, documented by the images in FIGS. 1 to 3: 1: 450 coulombs / dm 2 , conventionally produced litho sheet 2: 410 coulomb / dm 2 , conventionally produced litho sheet 3: 380 coulombs / dm 2 , Litho sheet produced according to the invention

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
EP96810492A 1996-07-25 1996-07-25 Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique Withdrawn EP0821074A1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP96810492A EP0821074A1 (fr) 1996-07-25 1996-07-25 Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique
AU28594/97A AU713379B2 (en) 1996-07-25 1997-07-10 Process for manufacturing a strip of aluminium alloy for lithographic printing plates
IS4521A IS4521A (is) 1996-07-25 1997-07-11 Aðferð við að framleiða lengju úr ál-málmblendi fyrir steinprentsplötur
CA002210588A CA2210588C (fr) 1996-07-25 1997-07-15 Procede pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique
ZA9706325A ZA976325B (en) 1996-07-25 1997-07-17 Process for manufacturing a strip of aluminium alloy for lithographic printing plates.
US08/896,539 US6439295B1 (en) 1996-07-25 1997-07-18 Process for manufacturing a strip of aluminum alloy for lithographic printing plates
NO973398A NO973398L (no) 1996-07-25 1997-07-23 Fremstilling av aluminiumslegeringsbånd for litografiske trykkplater
HU9701289A HUP9701289A3 (en) 1996-07-25 1997-07-24 Method for producing lithographic stamp made of aluminium alloy
JP20020697A JP3315059B2 (ja) 1996-07-25 1997-07-25 リトグラフ板およびそのためのアルミニウム又はアルミニウム合金のストリップの製造方法
US10/175,914 US6655282B2 (en) 1996-07-25 2002-06-21 Process for manufacturing a strip of aluminium alloy for lithographic printing plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96810492A EP0821074A1 (fr) 1996-07-25 1996-07-25 Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique

Publications (1)

Publication Number Publication Date
EP0821074A1 true EP0821074A1 (fr) 1998-01-28

Family

ID=8225661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810492A Withdrawn EP0821074A1 (fr) 1996-07-25 1996-07-25 Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique

Country Status (9)

Country Link
US (2) US6439295B1 (fr)
EP (1) EP0821074A1 (fr)
JP (1) JP3315059B2 (fr)
AU (1) AU713379B2 (fr)
CA (1) CA2210588C (fr)
HU (1) HUP9701289A3 (fr)
IS (1) IS4521A (fr)
NO (1) NO973398L (fr)
ZA (1) ZA976325B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999041031A1 (fr) * 1998-02-13 1999-08-19 Pechiney Rhenalu Bandes en alliage d'aluminium a grande homogeneite de surface et procede de fabrication de ces bandes
EP1110631A1 (fr) * 1999-12-23 2001-06-27 Alusuisse Technology & Management AG Procédé pour la fabrication d'une bande d'aluminium pour plaques d'impression lithographique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0821074A1 (fr) * 1996-07-25 1998-01-28 Alusuisse Technology & Management AG Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique
CN102527715A (zh) * 2011-12-09 2012-07-04 江苏鑫皇铝业发展有限公司 一种采用双辊轧制生产装饰用拉丝铝带工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193710A2 (fr) * 1985-03-02 1986-09-10 Vereinigte Aluminium-Werke Aktiengesellschaft Feuille en aluminium pour l'impression offset et son procédé de fabrication
JPH01162751A (ja) * 1987-12-17 1989-06-27 Kobe Steel Ltd 平版印刷版用アルミニウム板の製造方法
EP0640694A1 (fr) * 1993-08-31 1995-03-01 Nippon Light Metal Co., Ltd. Substrat en alliage d'aluminium pour une plaque d'impression lithographique et procédé de fabrication
EP0643149A1 (fr) * 1993-09-13 1995-03-15 Fuji Photo Film Co., Ltd. Procédé pour la production d'un support pour plaques d'impression planographique
EP0657559A1 (fr) * 1993-12-13 1995-06-14 Nippon Light Metal Co., Ltd. Substrat pour une plaque lithographique grainable électrolytiquement en alliage d'aluminium et procédé de fabrication
EP0672759A1 (fr) * 1994-03-17 1995-09-20 Fuji Photo Film Co., Ltd. Support de plaque pour l'impression planographique et procédé de fabrication

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223737B1 (fr) * 1985-10-30 1989-12-27 Schweizerische Aluminium Ag Support pour plaque d'impression lithographique
DE69320312T2 (de) * 1992-11-20 1998-12-17 Fuji Photo Film Co Ltd Träger für eine Flachdruckplatte und Herstellungsverfahren dafür
US5503689A (en) * 1994-04-08 1996-04-02 Reynolds Metals Company General purpose aluminum alloy sheet composition, method of making and products therefrom
US5655593A (en) * 1995-09-18 1997-08-12 Kaiser Aluminum & Chemical Corp. Method of manufacturing aluminum alloy sheet
EP0821074A1 (fr) * 1996-07-25 1998-01-28 Alusuisse Technology & Management AG Procédé pour la production d'une bande en alliage d'aluminium pour plaques d'impression lithographique
JPH10258340A (ja) * 1997-03-14 1998-09-29 Fuji Photo Film Co Ltd 平版印刷版用アルミニウム支持体及びその製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193710A2 (fr) * 1985-03-02 1986-09-10 Vereinigte Aluminium-Werke Aktiengesellschaft Feuille en aluminium pour l'impression offset et son procédé de fabrication
JPH01162751A (ja) * 1987-12-17 1989-06-27 Kobe Steel Ltd 平版印刷版用アルミニウム板の製造方法
EP0640694A1 (fr) * 1993-08-31 1995-03-01 Nippon Light Metal Co., Ltd. Substrat en alliage d'aluminium pour une plaque d'impression lithographique et procédé de fabrication
EP0643149A1 (fr) * 1993-09-13 1995-03-15 Fuji Photo Film Co., Ltd. Procédé pour la production d'un support pour plaques d'impression planographique
EP0657559A1 (fr) * 1993-12-13 1995-06-14 Nippon Light Metal Co., Ltd. Substrat pour une plaque lithographique grainable électrolytiquement en alliage d'aluminium et procédé de fabrication
EP0672759A1 (fr) * 1994-03-17 1995-09-20 Fuji Photo Film Co., Ltd. Support de plaque pour l'impression planographique et procédé de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 423 (C - 638) 20 September 1989 (1989-09-20) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999041031A1 (fr) * 1998-02-13 1999-08-19 Pechiney Rhenalu Bandes en alliage d'aluminium a grande homogeneite de surface et procede de fabrication de ces bandes
FR2774930A1 (fr) * 1998-02-13 1999-08-20 Pechiney Rhenalu Bandes en alliage d'aluminium a grande homogeneite de surface et procede de fabrication de ces bandes
US6834708B1 (en) 1998-02-13 2004-12-28 Pechiney Rhenalu Aluminium alloys strips with high surface homogeneity and method for making same
EP1110631A1 (fr) * 1999-12-23 2001-06-27 Alusuisse Technology & Management AG Procédé pour la fabrication d'une bande d'aluminium pour plaques d'impression lithographique
WO2001047649A1 (fr) * 1999-12-23 2001-07-05 Alcan Technology & Management Ltd. Procede de fabrication d'une bande d'aluminium pour plaques d'impression lithographique

Also Published As

Publication number Publication date
NO973398L (no) 1998-01-26
CA2210588A1 (fr) 1998-01-25
HU9701289D0 (en) 1997-09-29
IS4521A (is) 1998-01-26
US20020189784A1 (en) 2002-12-19
US6655282B2 (en) 2003-12-02
CA2210588C (fr) 2003-12-02
AU2859497A (en) 1998-02-05
NO973398D0 (no) 1997-07-23
JPH1096069A (ja) 1998-04-14
HUP9701289A2 (hu) 1998-03-02
AU713379B2 (en) 1999-12-02
JP3315059B2 (ja) 2002-08-19
HUP9701289A3 (en) 2000-05-29
US6439295B1 (en) 2002-08-27
ZA976325B (en) 1998-02-03

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